161596166512 has 40 divisors (see below), whose sum is σ = 349498702080. Its totient is φ = 71744594880.

The previous prime is 161596166503. The next prime is 161596166521. The reversal of 161596166512 is 215661695161.

It is an interprime number because it is at equal distance from previous prime (161596166503) and next prime (161596166521).

It is a super-2 number, since 2×161596166512² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10668712 + ... + 10683847.

It is an arithmetic number, because the mean of its divisors is an integer number (8737467552).

Almost surely, 2^161596166512 is an apocalyptic number.

It is an amenable number.

161596166512 is an abundant number, since it is smaller than the sum of its proper divisors (187902535568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161596166512 is a wasteful number, since it uses less digits than its factorization.

161596166512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21352621 (or 21352615 counting only the distinct ones).

The product of its digits is 583200, while the sum is 49.

The spelling of 161596166512 in words is "one hundred sixty-one billion, five hundred ninety-six million, one hundred sixty-six thousand, five hundred twelve".